Basler BE1-50/51B-237 Instruction Manual
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Basler BE1-50/51B-237 Instruction Manual

Overcurrent relays
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INSTRUCTION MANUAL
FOR
OVERCURRENT RELAYS
BE1-50/51B-237 and BE1-50/51B-238
Publication: 9252000899
Revision: —
04/08

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Summary of Contents for Basler BE1-50/51B-237

  • Page 1 INSTRUCTION MANUAL OVERCURRENT RELAYS BE1-50/51B-237 and BE1-50/51B-238 Publication: 9252000899 Revision: — 04/08...
  • Page 3 INTRODUCTION This instruction manual provides information about the operation and installation of the BE1-50/51B-237 and BE1-50/51B-238 Overcurrent Relays. To accomplish this, the following information is provided: • General Information and Specifications • Controls and Indicators • Functional Description • Installation and Maintenance •...
  • Page 4 April 2008 CONFIDENTIAL INFORMATION of Basler Electric, Highland Illinois, USA. It is loaned for confidential use, subject to return on request, and with the mutual understanding that it will not be used in any manner detrimental to the interest of Basler Electric.
  • Page 5 REVISION HISTORY The following information provides a historical summary of the changes made to this instruction manual (9252000899). Revisions are listed in reverse chronological order. Manual Revision and Date Change • —, 04/08 Initial release 9252000899 Rev — BE1-50/51B-237/-238 Introduction...
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  • Page 7: Table Of Contents

    SECTION 1 • GENERAL INFORMATION ....................1-1 SECTION 2 • CONTROLS AND INDICATORS ..................2-1 SECTION 3 • FUNCTIONAL DESCRIPTION ................... 3-1 SECTION 4 • INSTALLATION ........................4-1 SECTION 5 • TESTING ..........................5-1 APPENDIX A • CHARACTERISTIC CURVES..................A-1 9252000899 Rev — BE1-50/51B-237/-238 Introduction...
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  • Page 9 Environment ............................1-7 Physical .............................. 1-7 Figures Figure 1-1. Current Sensing Input Derating Curve (BE1-50/51B-237)............1-3 Figure 1-2. Current Sensing Input Derating Curve (BE1-50/51B-238)............1-4 Figure 1-3. Current Sensing Input Burden (BE1-50/51B-237) ..............1-4 Figure 1-4. Current Sensing Input Burden (BE1-50/51B-238) ..............1-5 Figure 1-5.
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  • Page 11: Table 1-1. Ge Iac Relays Suitable For Direct Replacement

    INTRODUCTION BE1-50/51B-237 and BE1-50/51B-238 protective relays are direct replacements for General Electric, IAC relays. The BE1-50/51B-237 has a 5-ampere current sensing input. The BE1-50/51B-238 has a 1-ampere current sensing input. Compatible IAC model numbers are listed in Table 1-1. Table 1-1. GE IAC Relays Suitable For Direct Replacement...

  • Page 12: Time Overcurrent (51) Element

    0.0 or 0.1 second, characteristic curve group selection for either GE IAC or ABB type curves, and instantaneous or integrating reset characteristics. Switch location and description is provided in Section 2. SPECIFICATIONS BE1-50/51B-237 and BE1-50/51B-238 electrical and physical specifications are listed in the following paragraphs. Time Overcurrent (51) Element BE1-50/51B-237 Pickup Setting Range: 0.5 to 15.9 Aac...

  • Page 13: Instantaneous Overcurrent B (50-B) Element

    400 Aac ∗ Continuous rating is 14 Aac for temperatures up to 45°C. See Figure 1-1 for derating curve. Continuous Current Current Sensing Input Ambient Temperature (C) Figure 1-1. Current Sensing Input Derating Curve (BE1-50/51B-237) 9252000899 Rev — BE1-50/51B-237/-238 General Information...

  • Page 14: Figure 1-2. Current Sensing Input Derating Curve (Be1-50/51B-238)

    Figure 1-3 illustrates the current sensing input burden characteristic. At 0.5 Aac: 2.8 Ω At 5.0 Aac: 0.3 Ω BE1-50/51B-230 CT Burden BE1-50/51B-237 CT Burden Input Current (Amps) Figure 1-3. Current Sensing Input Burden (BE1-50/51B-237) BE1-50/51B-237/-238 General Information 9252000899 Rev —...

  • Page 15: Frequency Response

    A change of ±5 Hz from the nominal 50/60 Hz current causes <0.5% change in the current required for pickup. Transient Response <10% overreach with system time constants up to 40 ms. Harmonic Rejection Rejection of odd and even harmonics is illustrated in Figure 1-5. 9252000899 Rev — BE1-50/51B-237/-238 General Information...

  • Page 16: Harmonic Rejection

    Make and carry 30 amperes for 0.2 seconds, carry 7 amperes for 2 minutes, 3 amperes continuously, and break 0.3 ampere. (L/R = 0.04). Terminal Assignments 51 Element: 1, 2 50-A Element: 1, 2 50-B Element: 1, 3 BE1-50/51B-237/-238 General Information 9252000899 Rev —...

  • Page 17: Type Tests

    Electrostatic Discharge: IEEE C37.90.3 Vibration: IEC 255-21-1 Shock and Bump: IEC 255-21-2 Environment Operating Temperature: –40 to 70°C (–40 to 158°F) Storage Temperature: –50 to 70°C (–58 to 158°F) Physical Weight: 6.1 lb (2.77 kg) 9252000899 Rev — BE1-50/51B-237/-238 General Information...
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  • Page 19: Section 2 • Controls And Indicators

    Figures Figure 2-1. Front Panel Controls and Indicators ..................2-1 Figure 2-2. Circuit Board Controls ......................2-3 Figure 2-3. View of 50-B Pickup Selector Switches (BE1-50/51B-237) ............ 2-5 Figure 2-4. View of 50-B Pickup Selector Switches (BE1-50/51B-238) ............ 2-5 Tables Table 3-1.
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  • Page 21 SECTION 2 • CONTROLS AND INDICATORS INTRODUCTION BE1-50/51B-237 and BE1-50/51B-238 relay controls and indicators are located on the front panel and circuit board. FRONT PANEL CONTROLS AND INDICATORS Front panel controls and indicators are illustrated in Figure 2-1 and described in Table 2-1. The locators and descriptions of Table 2-1 correspond to the locators shown in Figure 2-1.

  • Page 22: Target Indicators

    Instantaneous Overcurrent A Pickup Selector Switches. These two rotary switches select the instantaneous overcurrent A (50-A) pickup current setting in amperes (UNITS and TENTHS on the BE1-50/51B-237, COARSE and FINE on the BE1-50/51B-238). Adjusting these selector switches while the relay is in service may cause the relay to trip.
  • Page 23 Circuit board controls are illustrated in Figure 2-2 and described in Table 2-2. The locators and descriptions of Table 2-2 correspond to the locators shown in Figure 2-2. Figure 2-2. Circuit Board Controls 9252000899 Rev — BE1-50/51B-237/-238 Controls and Indicators...
  • Page 24 The 50-B pickup switches are accessed on the top side of the draw-out assembly by removing the draw-out assembly from the case. Figure 2-3 shows the 50-B pickup switches as viewed at the right side of the draw-out assembly of the BE1-50/51B-237. The BE1- 50/51B-238 is shown in Figure 2-4.
  • Page 25 Figure 2-3. View of 50-B Pickup Selector Switches (BE1-50/51B-237) Figure 2-4. View of 50-B Pickup Selector Switches (BE1-50/51B-238) 9252000899 Rev — BE1-50/51B-237/-238 Controls and Indicators...
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  • Page 27: Section 3 • Functional Description

    Current Sensing Input ........................3-1 Power CT and Power Supply ......................3-1 Signal Conditioning ..........................3-1 Microprocessor ........................... 3-1 Outputs ............................... 3-2 Target Indicators ..........................3-2 Figures Figure 3-1. Function Block Diagram ......................3-1 9252000899 Rev — BE1-50/51B-237/-238 Functional Description...
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  • Page 29 This section illustrates and describes the functional capabilities of the BE1-50/51B-237 and BE1-50/51B- 238 relays. FUNCTION BLOCK DESCRIPTIONS The function blocks of the BE1-50/51B-237 and BE1-50/51B-238 relays are illustrated in Figure 3-1 and described in the following paragraphs. Figure 3-1. Function Block Diagram...
  • Page 30 The minimum operating current range can be set for 80 to 200 milliamperes or 0.9 to 2.25 amperes. See Section 2, Controls and Indicators for jumper locations and function assignments. BE1-50/51B-237/-238 Functional Description 9252000899 Rev —...

  • Page 31: Section 4 • Installation

    FACTORY SETTINGS........................... 4-1 INSTALLATION............................4-1 CONNECTIONS ............................ 4-2 APPLICATION COORDINATION ......................4-3 MAINTENANCE ............................. 4-4 STORAGE.............................. 4-4 Figures Figure 4-1. Typical AC Connections......................4-2 Figure 4-2. Typical DC Connections......................4-3 Figure 4-3. Coordination Timing Diagram ....................4-4 9252000899 Rev — BE1-50/51B-237/-238 Installation...
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  • Page 33: Section 4 • Installation

    • Reinstall the existing connection plug. • To install the cover, position the interlocking bracket at the top of the new Basler Electric cover into the mating receptacle at the top of the cover adapter plate. Secure the captive fastener at the bottom of the cover.

  • Page 34: Connections

    CONNECTIONS Typical ac and dc connections are shown in Figures 4-1 and 4-2. Figure 4-1. Typical AC Connections BE1-50/51B-237/-238 Installation 9252000899 Rev —...

  • Page 35: Application Coordination

    Figure 4-2. Typical DC Connections APPLICATION COORDINATION In a typical application coordination scheme, a BE1-50/51B-237 or BE1-50/51B-238 is used to provide primary protection for a radial distribution feeder. An electromechanical overcurrent relay with extremely inverse timing provides protection for the transformer and bus. To improve coordination with the...

  • Page 36: Maintenance

    Figure 4-3. Coordination Timing Diagram MAINTENANCE BE1-50/51B-237 and BE1-50/51B-238 relays require no preventative maintenance other than periodic checking of relay connections to make sure that they are clean and tight. If the relay fails to function properly, contact the Technical Sales Support department of Basler Electric.

  • Page 37: Section 5 • Testing

    SECTION 5 • TESTING ..........................5-1 INTRODUCTION............................ 5-1 DIELECTRIC TEST ..........................5-1 TEST PROCEDURES ........................... 5-1 Model BE1-50/51B-237 (Five Ampere Sensing Input)............... 5-1 Time Overcurrent (51) Pickup......................5-1 Time Dial............................5-2 Integrating Reset ..........................5-2 Instantaneous Overcurrent A (50-A) Pickup................... 5-2 Instantaneous Overcurrent B (50-B) Pickup...................
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  • Page 39: Section 5 • Testing

    Output contacts are surge protected. TEST PROCEDURES The following test procedures verify operation of the BE1-50/51B-237 and BE1-50/51B-238 relays. The test setups illustrated in Figures 5-1 through 5-6 are intended primarily as an illustration of the principles involved. Other test equipment known to be capable of testing with the stated and implied tolerances (including equipment designed specifically for testing protective relays) may be used.

  • Page 40: Time Dial

    The elapsed time should be 2.08 ±0.4 seconds. Instantaneous Overcurrent A (50-A) Pickup 1. Connect and configure the relay for 50-A pickup testing: a. Connect the test setup shown in Figure 5-1. b. Set circuit board switch SW3 as follows: BE1-50/51B-237/-238 Testing 9252000899 Rev —...

  • Page 41: Instantaneous Overcurrent B (50-B) Pickup

    SW3-2 = OFF (no additional time delay for the 50-A element) SW3-3 = ON (GE IAC type characteristic curves) SW3-4 = ON (integrating reset characteristic) c. Set TIME DIAL to 0.0. d. Set CURVE to S. 9252000899 Rev — BE1-50/51B-237/-238 Testing...

  • Page 42: Target Indicators

    2. Apply 2 Aac to terminals 5 and 6 to trip the 51 relay output. 3. Slowly increase the target current source and verify that the Time target operates at the level of current determined by the Target Operating Current Jumpers. BE1-50/51B-237/-238 Testing 9252000899 Rev —...

  • Page 43: Manual Trip

    Set INST PICKUP (50-B) (accessed at the top side of the assembly) to 20 (2.0 Aac). 2. Apply 0.9 Aac to terminals 5 and 6 (0.9 Aac provides relay operating power but is below the pickup threshold.) 9252000899 Rev — BE1-50/51B-237/-238 Testing...

  • Page 44: Model Be1-50/51B-238 (One Ampere Sensing Input)

    3. Apply the current (step from 0 to 0.3 Aac) and record the elapsed time. The elapsed time should be between 0.345 and 0.424 seconds. (This tolerance is greater than ±2% because it is the accumulation of both pickup and timing tolerances.) 4. Remove the input current. BE1-50/51B-237/-238 Testing 9252000899 Rev —...

  • Page 45: Integrating Reset

    4. Set INST PICKUP (50-A) to 1.6. 5. Slowly increase the current applied to terminals 5 and 6 until the 50-A output contacts close. The applied current should be between 1.563 and 1.637 Aac. 6. Reduce the applied current to zero. 9252000899 Rev — BE1-50/51B-237/-238 Testing...

  • Page 46: Instantaneous Overcurrent B (50-B) Pickup

    4. Set INST PICKUP (50-B) to 80 (1.6 Aac). 5. Slowly increase the current applied to terminals 5 and 6 until the 50-B output contacts close. The applied current should be between 1.563 and 1.637 Aac. 6. Reduce the applied current to zero. BE1-50/51B-237/-238 Testing 9252000899 Rev —...

  • Page 47: Target Indicators

    8. Slowly increase the target current source and verify that the Instantaneous target operates at the level of current determined by the Target Operating Current Jumpers. 9. Remove the target and sensing current and reset the targets. 9252000899 Rev — BE1-50/51B-237/-238 Testing...

  • Page 48: Manual Trip

    6. Connect a jumper to the Instantaneous Overcurrent Manual Trip jacks. Verify that the stop input of the test set timer recognizes a 50-A contact closure 7. Remove the jumper and the current applied to relay terminals 5 and 6. 8. Reset targets. 5-10 BE1-50/51B-237/-238 Testing 9252000899 Rev —...
  • Page 49 Figure A-15. Extremely Inverse (E2) Time Characteristic Curve (SW3-3 On, Similar to GE IAC 77) ..A-16 Figure A-16. Integrating Reset Characteristic Curve................A-17 Tables Table A-1. Time Characteristic Curve Constants with Switch SW3-3 Open (Off)........A-2 Table A-2. Time Characteristic Curve Constants with Switch SW3-3 Closed (On) ........A-2 9252000899 Rev — BE1-50/51B-237/-238 Characteristic Curves...
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  • Page 51: Appendix A • Characteristic Curves

    50-B element is not switch-selectable and is fixed at no intentional delay. Pickup The instantaneous elements of the BE1-50/51B-237 and BE1-50/51B-238 relays may be set lower than the instantaneous element in IAC relays and still have the same reach. This is because the BE1-50/51B- 237 and BE1-50/51B-238 instantaneous elements effectively eliminate the fault current transient overreach components.
  • Page 52 BS142-C∗ None† None 0.0000 1.00000 0.000 0.0000 0.000 1.0000 ∗ Curves B and C are defined in British Standard BS142 and IEC 255-4 (International Electrotechnical Commission). † Fixed time from 0.1 to 9.9 seconds. BE1-50/51B-237/-238 Characteristic Curves 9252000899 Rev —...
  • Page 53 Characteristic Curves Figures A-2 through A-15 illustrate the BE1-50/51B-237 and BE1-50/51B-238 time overcurrent characteristic curves. Figure A-2. Short Inverse (S) Time Characteristic Curve (SW3-3 Off, Similar to ABB CO-2) 9252000899 Rev — BE1-50/51B-237/-238 Characteristic Curves...
  • Page 54 Figure A-3. Long Inverse (L) Time Characteristic Curve (SW3-3 Off, Similar to ABB CO-5) BE1-50/51B-237/-238 Characteristic Curves 9252000899 Rev —...
  • Page 55 Figure A-4. Definite Time (D) Time Characteristic Curve (Similar to ABB CO-6) 9252000899 Rev — BE1-50/51B-237/-238 Characteristic Curves...
  • Page 56 Figure A-5. Moderately Inverse (M) Time Characteristic Curve (Similar to ABB CO-7) BE1-50/51B-237/-238 Characteristic Curves 9252000899 Rev —...
  • Page 57 Figure A-6. Inverse (I) Time Characteristic Curve (SW3-3 Off, Similar to ABB CO-8) 9252000899 Rev — BE1-50/51B-237/-238 Characteristic Curves...
  • Page 58 Figure A-7. Very Inverse (V) Time Characteristic Curve (SW3-3 Off, Similar to ABB CO-9) BE1-50/51B-237/-238 Characteristic Curves 9252000899 Rev —...
  • Page 59 Figure A-8. Extremely Inverse (E) Time Characteristic Curve (SW3-3 Off, Similar to ABB CO-11) 9252000899 Rev — BE1-50/51B-237/-238 Characteristic Curves...
  • Page 60 Figure A-9. BS142 Very Inverse (BS142-B) Time Characteristic Curve A-10 BE1-50/51B-237/-238 Characteristic Curves 9252000899 Rev —...
  • Page 61 Figure A-10. BS142 Extremely Inverse (BS142-C) Time Characteristic Curve 9252000899 Rev — BE1-50/51B-237/-238 Characteristic Curves A-11...
  • Page 62 Figure A-11. Short Inverse (S2) Time Characteristic Curve (SW3-3 On, Similar to GE IAC 55) A-12 BE1-50/51B-237/-238 Characteristic Curves 9252000899 Rev —...
  • Page 63 Figure A-12. Long Inverse (L2) Time Characteristic Curve (SW3-3 On, Similar to GE IAC 66) 9252000899 Rev — BE1-50/51B-237/-238 Characteristic Curves A-13...
  • Page 64 Figure A-13. Inverse (I2) Time Characteristic Curve (SW3-3 On, Similar to GE IAC 51) A-14 BE1-50/51B-237/-238 Characteristic Curves 9252000899 Rev —...
  • Page 65 Figure A-14. Very Inverse (V2) Time Characteristic Curve (SW3-3 On, Similar to GE IAC 53) 9252000899 Rev — BE1-50/51B-237/-238 Characteristic Curves A-15...
  • Page 66 Figure A-15. Extremely Inverse (E2) Time Characteristic Curve (SW3-3 On, Similar to GE IAC 77) A-16 BE1-50/51B-237/-238 Characteristic Curves 9252000899 Rev —...
  • Page 67 Timing accuracy is the sum of ±1 cycle, ±2%. This accuracy applies to the range of 1.3 to 40 times tap and is for a given measured multiple of tap. Measurement accuracy of the multiple of tap is the sum of ±2%, ±25 mA for the BE1-50/51B-237 and ±2%, ±5 mA for the BE1-50/51B-238. Fixed Time Characteristic The fixed time characteristic corresponds to the time dial setting and provides delays of 0.0 to 9.9...
  • Page 68 Instantaneous Reset Reset occurs within 16 ms of when the current decreases to 95% of the pickup level. A-18 BE1-50/51B-237/-238 Characteristic Curves 9252000899 Rev —...
  • Page 69 ROUTE 143, BOX 269 HIGHLAND, IL 62249 USA http://www.basler.com, info@basler.com PHONE +1 618-654-2341 FAX +1 618-654-2351...

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Be1-50/51b-238

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